# coding:utf-8

class Range:
    def __init__(self, frm, to, size):
        self.__from = frm
        self.__to = to
        self.__size = size

    def set_from(self,_from):
        self.__from = _from
    def get_from(self):
        return self.__from

    def set_to(self,_to):
        self.__to = _to
    def get_to(self):
        return self.__to

    def set_size(self,_size):
        self.__size = _size
    def get_size(self):
        return self.__size